OS1CH01 O.S. Speed B21 Ronda Drake Pink Edition Engine 75mm Header TB03-2100SC Pipe Comb


Note we hold physical stock with live stock levels unlike others 😉


In addition to the O.S. SPEED B21 Adam Drake edition 2, we are proudly releasing O.S. SPEED B21 Ronda Drake Pink edition featuring a pink cooling head and pink carburetor restrictors, which are my signature colors. I am Ronda Drake, the wife of Adam Drake, and yes I am also a racer. It’s a excellent choice for both buggy and truck racing as it provides a linear power band, exceptional fuel mileage and tons of overall power. Now we have two different colors in the same specifications; bore x stroke 16.4 x 16.55mm, the double-counter weight embedded crankshaft with DLC hard coating, a ceramic rear ball bearing, an o-ringed inner head, and an easy adjustable ball link.

The B21 Ronda Drake Pink edition combo set includes the TB03/2100SC pipe and 75mm manifold.  The 2090SC with 85mm manifold is also a nice option for the B21 RD Pink edition.


Engine Features

  • Ronda and Adam Drake’s unique engine specs are not used on any other O.S. Speed engine.
  • Great for buggy and truck racing.
  • Redesigned cylinder liner with optimized porting.
  •  DLC crankshaft with larger double tungsten counterweight.
  • Semi-long stroke configuration.
  • Pink anodized 6.5 and 7.0 mm carburetor reducers included.
  • Ceramic rear bearing.
  • 21J carburetor.
  • O.S.SPEED P3 gold plug, great for medium and low speed torque performance, is also included


  • Displacement: 0.213 cu in (3.49cc)
  • Bore: 0.646″ (16.4mm)
  • Stroke: 0.652″ (16.55mm)
  • Practical RPM: 4,000-42,000 RPM
  • Output: 2.65PS 34,000 RPM, 2.61HP @ 34,000RPM
  • Weight: (12.77oz (362g)

O.S. Speed B21 Ronda Drake Pink Edition Engine 75mm Header TB03-2100SC Pipe Comb